Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Chapter 42.2, Problem 1CC
Why is there interest in developing alternatives to ethanol as the biofuel of choice in the United States?
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Chapter 42 Solutions
Prescott's Microbiology
Ch. 42.1 - Why are the cells first fed lactose and then...Ch. 42.1 - What critical limiting factors are used in the...Ch. 42.1 - Prob. 2CCCh. 42.1 - What kinds of molecular changes result from...Ch. 42.1 - Prob. 4CCCh. 42.2 - Why is there interest in developing alternatives...Ch. 42.2 - What types of microbes are good candidates for the...Ch. 42.3 - What is the objective of the scale-up process and...Ch. 42.3 - What parameters can be monitored in a modern,...Ch. 42.3 - Which of the following are secondary metabolites:...
Ch. 42.4 - Why are modular genes particularly suitable as...Ch. 42.4 - Prob. 2MICh. 42.4 - Prob. 1CCCh. 42.4 - Prob. 2CCCh. 42.4 - What is metabolic engineering? Besides...Ch. 42.4 - What is high-throughput screening and why has it...Ch. 42.4 - Prob. 5CCCh. 42.5 - Prob. 1MICh. 42.5 - What is the Ti plasmid and how is it modified for...Ch. 42.5 - How is Bt toxin produced and why is it so widely...Ch. 42.5 - Prob. 3CCCh. 42.6 - Why are diatoms and magnetotactic bacteria of...Ch. 42.6 - Prob. 2CCCh. 42 - Prob. 1RCCh. 42 - Prob. 2RCCh. 42 - Prob. 3RCCh. 42 - Prob. 4RCCh. 42 - Prob. 5RCCh. 42 - Prob. 6RCCh. 42 - Prob. 7RCCh. 42 - Prob. 1ALCh. 42 - Prob. 2AL
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- Switchgrass is used for ethanol production. The composition of the switchgrass is 37% cellulose, 24% xylan, 3% galactan, 4% arabinan, 20% lignin, 7% extractives, and 5% ash. A dilute acid pretreatment method is applied to the switchgrass before enzymatic hydrolysis and fermentation. The pretreatment hydrolyzes 10% hexosan and 90% pentosan into monomeric sugars. Approximately 30% of the hydrolyzed pentoses further react & are decomposed to furfural. Assume that there is no decomposition of the hydrolyzed hexoses. Further Assume that lignin, extractives, and ash do not change during the pretreatment. • How much of each lignocellulosic sugar (glucose, xylose, galactose, and arabinose) is produced when pretreating 1,000 kg (dry matter) switchgrass? How much furfural is formed? • Is water consumed or produced in these pretreatment hydrolysis and dehydration reactions? How much in each?arrow_forwardWhat is the key difference between reactions that result in the final product of fermentation to form lactic acid or alcohol? What significance do these differences have in terms of microbial technology?arrow_forwardDescribe the following chemicals require in fermentation medium a) Micronutrient b) Trace elementarrow_forward
- What are some of the ethical considerations of fuelling a car with ethanol obtained from sugarcane versus petrochemical is discussed below in detailarrow_forwardRead the following article. ASK MR. GREEN: Organic Produce versus Nonorganic Produce Dear Mr. Green: Lately I see more and more "organic" fruits and vegetables in the supermarkets. I'm confused. Often the organic apples or strawberries aren't as red or as large as the other ones. They sometimes have spots or insect holes. And organic produce can cost three times as much as other produce! So, tell me, what exactly are organic fruits and vegetables? And why are they so expensive? Confused Shopper Now Read Mr. Green's answer. Dear Confused Shopper, You're right. Sometimes organic produce doesn't look as nice as nonorganic produce, and it generally costs up to 50 percent more. Let me explain why. Since about 1950, farmers have used chemicals to grow their fruits and vegetables. They use pesticides to kill insects that eat their plants. They use herbicides to kill the weeds that kill their plants. These chemicals are a great help to farmers. By using them, farmers can grow more produce on…arrow_forwardWhy is the batch bioreactor is suitable in milk fermentation?arrow_forward
- Draw the batch bioreactor used in the production of Parmesan cheese in a simple form.arrow_forwardWhich of the following formulas are correct regarding productivity? (recall; GPP gross primary production, NPP = net primary production, & R = respiration) Mark only one oval. OA) GPP+R=NPP OB) GPP-R=NPP C) NPP-GPP=R D) NPP-R=GPP Plants assimilate energy through the process of which? Mark only one oval. A) decomposition. B) respiration. C) photosynthesis. V D) regeneration. Net primary productivity in an ecosystem increases as mean annual temperature... Mark only one oval. OA) and mean annual rainfall decrease. B) decreases and mean annual rainfall increases. C) increases and mean annual rainfall decreases. D) and mean annual rainfall increases. Garrow_forwardThe following carbon sources can be used for nutrition, by at least some heterotrophic organisms, except: CH3COOH CH3OH CO2 CH4 HCOOHarrow_forward
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